Apparatus for coating objects with subdivided material.



' F. P. BRADLEY. v APPARATUS FOR COATING OBJECTS WITH SUBDIVIDEDMATERIAL.

APPLIOA'I'IQH FILED 5111631911.

' Eatentmd June 20,1911.

PATENT OFFICE.

FFANKLIN-F. mmnmm orcmceeo, ILLINOIS, ASSIGNOR. 'ro ,IBRADLEY AND vnoo-'1 MANCOMPANYQOEOHIGAGQJILLINOIS, A CORPORATION or ILLINOIS.

\ useful li'nprovexnent 'in Apparatus foriCOab;

APPARATUS, r03 Cha m-wens wIrrH SUBDIVIDECD MATERIAL.-

: }spei e ti n,dimmers Patent. Patented June 25, 1911.) naiea'ion'a'aMarehi'G, 1911. SeriaINo. 514,879.

To all whom it mayronc'rii;

LEY, citizen ofthe United, States, residing at Ch cago, in the-county'ofCook and State of Illlnois, have invented a certain new and i'ngjQbjectswith. subdivided Material, of

part ofthis specification.

which the followingisa full, clear, concise,

andlexact; description, reference being had t6 the accompanyingdrawings,; forming a nvention relates to apparatus forco at ing obj ectswith subdivided material.

to the'coating of objects withsubdivided material as follows Serial No.543,215, filed February 11', 1910; Serial No. 550,315, filed March-18,191 Serial No. 569,428, filed January-18, 1911 ;Serial No.

Junef 29,1910; Serial No. 58 83730,- .filed October 24, 1910,;SerialNo,= 588.731, filed October 24, 1910; Serial No.'. 603,251,' filedJanuary 20, 191 'Serial'No; 609,203, fired February 17, 1911} Serial No.609,204, fi led February 17,1911; SeriaLNo. 611,042,'filed February27,1911; and Serial No. 617,149,

' filedMarch 27, 1911.

- invention has purposes and advantages which are. ,desirably' realizedin one striicture, but to the, accomplishment of which by one structureI ,donotwish ,to be limited. 7

invent i n for one purpose the provision f of. an improved apparat usfrom which theHu'nd-u'e escape Ipf the-subdivided material is preventedwhile the apparatus is operation, whereby the operation of the apparatusneed not be stopped or mate-.

rially modified in order, to withdraw the coated objects from theapparatus and-t0 substitute therefor other objects to be coated. Thisand other "features o f iny, in

vention will be fully explained by reference to the accompanying drawingshowing the preferred embodiment of the invention, and in which- Figure1 is a sectional plan View otthe preferred form of apparatus; Fig. 1s asectional elevation on line 2 2 of F1g. 1; Fig. 3 is a diagrammatic viewillustrat ng the operationof the apparatus.

Like'parts are indicated by s1m1lar characters of referencethroughoutthe difierent figures. I employ a receptacle 0 provlded with an Iliavehitherto filed applications relatingi opening I), through which theobjects to be coated-may .be passed into the receptacle interior. Theobjectc-illu'strated is a metal] bedstead part that is placed up'onaiw'heeled truck. d in order that itmay bemoved into and out ofthe'recept-acle; 'Some means is employedfor effecting the 'forcedcirculation of, air lwtithin the receptacle, the particr1Iar.,-Ineansillustrated beinga fan e :which is constructed to'causethe air where ithas fullest flow to follow a circuit or' stream within the receptacle.The fan is provided" with bladesfth at are shaped or disposed cart ascomponent partsof a screw'm order that the fan 'may cause an to flow ina stream; Irrespective of the location of the air circulating mechanism,I, desirably employ a partition-or partitions f within the receptaclewhereby the course -followed by the air circulating within thereceptacle'may'be defined owing to the division of the receptacleinterior into channels, in one of which channels the objects tobe coatedare to bereceived. Where the fan is'disposed upon the receptacleinterior, it is preferably located at the rear part of" the receptacleand is located in a wall 9 unitingthe rearvertical margins of the par?titions fiby which arrangementcommunication between the spaceintervening between the partitions f and t-he spacesintervening betweensaid partitions and the side walls of the receptacle is afiorded at therear of] the receptacle'only through the fan space.

Communication between the-spaces intervening between't-he receptaclewalls and the partitions f and the space intervening be.- tween saidpartitions is directly afl'orded at the front, portion ofthe receptacle,and in order the better to define the currents of ,tacle through thespace intervening-between thepartitions f and forwardly'through thespaces intervenin betweexi -said partitions and the receptac e, walls,the air Issuing from these latter 'spacesat the forward: ends aircirculating within the receptacle. the marginal portions of the entranceopening of the partitions) moving in streams rearwardly toward the fan.i

The subdivided material, such as bronze powder, with which the object isto be coated is admitted to the receptacle interior through a' funnel7a. The circulating air takes up the bronze powder and carries it to theobject 0 to be coated, this object previously having been' provided withsuitable adhesive material such as wet varnish having the capacity ofretaining'the particles of subdivided material conveyed thereto by theair laden with the same. Deflecting sur-' faces are afforded within thereceptacle interior, against which the material-laden air strikes andwhich take part in directing the air toward the object, and in creatingminor currents and eddies for the purpose of more thoroughly conveyingthe subdivided material to various parts of the object to .be coatedtherewith. The rear of the receptacle ,is preferably provided with a'plurality of j the air escaping from the rear of the receptacle.

My apparatus, as actually operated in practice, works so well that theopening 6 through which the objects to be coated are inserted need notbe provided with a door, as no appreciable or substantial amount ofsubdivided material finds escape through the opening I) even though thecoating operation be at its height. I do not wish to be limited however,to the absence of a -door for the opening 6. While the sheets of muslinor other suitable textile fabric indicated atz' constitute a means forrestricting the exit for the air, I do not wish to be limited to such ameans which also has the added function of intercepting particles ofsubdivided material, though I prefer a rest-ricting means having thisadded characteristic.

I have broadly claimed a process of coating objects with subdividedmaterial in my co-pending application Serial No. (314,001,

filed March 13, 1911.

lVhile I have herein shown and particularly described the preferredembodiment of my invention, I do not wish to be limited to the preciseconstruction shown as changes may readily be made without departing fromthe spirit of the invention.

Having thus described my invention, I.

claim as new and desire to secure by Letthe' receptacle interior to theexternal air,

said mechanism operating to draw air from the exterior of the receptaclein a direction from the aforesaid entrance opening toward the aforesaidexit opening, whereby the escape of material-laden air through saidentrance opening is materially prevented.

2. Apparatus for coating objects with subdivided material carried by airincluding a receptacle for the objects having an entrance opening forthe objects; and mechanism for effecting the forced passage of airwithin the receptacle, there being present a restricted opening for theexit of air from the receptacle interior to the external air, saidmechanism operating to draw air from the exterior of the receptacle ina. direction from the aforesaid entrance opening toward the aforesaidexit opening, whereby the escape of material-laden air through saidentrance opening is materially prevented, there being present means atsaid restrictedopening for removing subdivided material from the airpassing therethrough.

In Witness whereof, I hereunto subscribe my name this fifteenth day ofMarch A. D.,

FRANKLIN F. BRADLEY. Witnesses G. L. CRAGG,

G120. O. Dawson.

